CN107215895B - A kind of chemical precipitation method preparation Bi0.5Na0.5TiO3Method - Google Patents
A kind of chemical precipitation method preparation Bi0.5Na0.5TiO3Method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000009388 chemical precipitation Methods 0.000 title claims abstract description 13
- 239000000243 solution Substances 0.000 claims abstract description 67
- 229910010252 TiO3 Inorganic materials 0.000 claims abstract description 49
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000004202 carbamide Substances 0.000 claims abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 23
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 19
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 18
- 229910003890 H2TiO3 Inorganic materials 0.000 claims abstract description 17
- 239000011259 mixed solution Substances 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 11
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 11
- 239000002243 precursor Substances 0.000 claims abstract description 11
- 238000001354 calcination Methods 0.000 claims abstract description 10
- 230000001376 precipitating effect Effects 0.000 claims abstract description 8
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 7
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 36
- 239000000126 substance Substances 0.000 claims description 34
- 239000007864 aqueous solution Substances 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 18
- 230000032683 aging Effects 0.000 claims description 12
- 239000000428 dust Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 14
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000004090 dissolution Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000013049 sediment Substances 0.000 abstract description 3
- 238000003786 synthesis reaction Methods 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract description 2
- 239000011734 sodium Substances 0.000 description 30
- 239000000463 material Substances 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- 238000003980 solgel method Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000413 hydrolysate Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010532 solid phase synthesis reaction Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G29/00—Compounds of bismuth
- C01G29/006—Compounds containing, besides bismuth, two or more other elements, with the exception of oxygen or hydrogen
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/30—Three-dimensional structures
- C01P2002/34—Three-dimensional structures perovskite-type (ABO3)
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/04—Particle morphology depicted by an image obtained by TEM, STEM, STM or AFM
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- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
A kind of chemical precipitation method preparation Bi0.5Na0.5TiO3Method, using chemical precipitation method prepare Bi0.5Na0.5TiO3Powder, with Bi (NO3)3·5H2O、Na2CO3And H2TiO3As synthesis Bi0.5Na0.5TiO3The raw material of powder, using urea liquid as precipitating reagent homogeneous precipitation, first by Bi (NO3)3·5H2O is added into dilute nitric acid solution, and dissolution is obtained containing Bi3+Precursor solution, add H2TiO3, then by urea liquid and Na2CO3Solution is added slowly to Bi (NO3)3·5H2O and H2TiO3Mixed solution in, generate Bi0.5Na0.5TiO3Precipitating, is then dried sediment, calcines, and synthesizes Bi0.5Na0.5TiO3Powder.Preparation process is simple mixing, a drying and calcining process, and simple process is easily controllable.
Description
Technical field
The present invention relates to Bi in piezoelectric material0.5Na0.5TiO3A kind of preparation technical field, and in particular to chemical precipitation legal system
Standby Bi0.5Na0.5TiO3Method.
Background technique
Piezoelectric material has a wide range of applications in sensor, energy converter, driver, especially lead zirconate titanate [Pb (Zr,
Ti)O3PZT] base piezoelectric material, be widely used due to its excellent piezoelectric property.But contain in such material
A large amount of leaded oxides, be easy to cause lead contamination in environment, significantly limit the application and development of such piezoelectric material.Cause
This, develops new lead-free piezoelectric material instead of leaded piezoelectric material, becomes the hot spot of technical field of piezoelectric materials research.
Bi0.5Na0.5TiO3It (BNT) is a kind of ferroelectric material with perovskite structure, due to big residual polarization
(Pr=38uC/cm2) and high Curie's conversion temperature (Tc=320 DEG C), it is considered to be most it is hopeful to substitute PZT piezoelectric material
One of lead-free.Currently, Bi0.5Na0.5TiO3The common preparation method of powder has solid phase method, sol-gel method, hydro-thermal method
Deng.The raw material ball milling of reaction is uniformly mixed, is prepared by prolonged high-temperature heat treatment by solid reaction process
Bi0.5Na0.5TiO3Powder, is the method (MaterSci [J], 2015,50:5328-5336) being most widely used, but this method
The powder body material partial size prepared is larger, activity is low, specific surface area is small, is easy to happen component segregation.Sol-gel method preparation
Bi0.5Na0.5TiO3Powder chemical component is uniform, partial size is smaller (Nanotechnology, 2004,15:777-780), but work
Skill process is complex, and yield is lower.Hydrothermal synthesis method can prepare that partial size is smaller, Bi of different-shape0.5Na0.5TiO3Powder
Body (Mater.Chem [J], 2009,19:2253-2258), but this method needs the hydrogen using high concentration in the synthesis process
Sodium hydroxide solution, soaking time length, low yield.
Summary of the invention
In view of this, it is necessary to proposing a kind of chemical precipitation method preparation Bi0.5Na0.5TiO3Method.
A kind of chemical precipitation method preparation Bi0.5Na0.5TiO3Method, comprising the following steps:
Prepare the precursor solution of Bi: by Bi (NO3)3·5H2O is added into dilute nitric acid solution, stirs to after being completely dissolved
Obtain the precursor solution of Bi；
Add H2TiO3Template: the precursor solution of obtained Bi is continued under stirring condition, and H is added2TiO3, obtain
Even mixed solution A；
Addition precipitating reagent: the mixed uniformly solution A is continued under stirring condition, and aqueous solution of urea is added, it is molten to obtain B
Liquid；
Add Na2CO3Solution: the mixing B solution is continued under stirring condition, and Na is added2CO3It is molten to obtain C for aqueous solution
Liquid；
It is dry: dry in blocky little particle after obtained C solution is stood aging；
Calcining: further the blocky little particle after drying is calcined, obtains target Bi0.5Na0.5TiO3Powder.
Preferably, in the precursor solution for preparing Bi, the Bi (NO3)3·5H2The amount of the substance of O and dust technology
The ratio between be (0.25~1.25): 1.
Preferably, in the preparation Bi0.5Na0.5TiO3In step, the additional amount proportionate relationship of each substance meets Bi
(NO3)3·5H2The amount of the substance of O: H2TiO3Substance amount: the amount of the substance of urea: Na2CO3Substance amount be (0.5~
2): (1~1.5): (1~10): (0.5~30).
Preferably, it is 1~48h that ageing time is stood in the drying steps.
Preferably, the calcination temperature in the calcining step is 560~670 DEG C, and calcination time is 0.5~8h.
Preferably, in the preparation Bi0.5Na0.5TiO3In step, the additional amount proportionate relationship of each substance meets Bi
(NO3)3·5H2The amount of the substance of O: H2TiO3Substance amount: the amount of the substance of urea: Na2CO3Substance amount be 1.5:3:
17:5。
Technical effect of the invention are as follows: Bi is prepared using chemical precipitation method0.5Na0.5TiO3, with Bi (NO3)3·5H2O、
Na2CO3And H2TiO3As synthesis Bi0.5Na0.5TiO3The raw material of powder, using urea liquid as precipitating reagent, first by Bi
(NO3)3·5H2O is added into dilute nitric acid solution, and dissolution is obtained containing Bi3+Precursor solution, then in Bi3+Presoma it is molten
H is added in liquid2TiO3, obtain Bi (NO3)3With H2TiO3Mixed solution, then urea liquid is added slowly to Bi (NO3)3With
H2TiO3Mixed solution in, urea liquid and Bi (NO3)3Reaction generates Bi2CO5In H2TiO3Precipitating is generated in solution, then will
Na2CO3Solution is added in mixed solution, obtains further sediment, is then dried, is calcined to sediment, is generated
Bi0.5Na0.5TiO3Powder.
For the present invention using urea liquid as precipitating reagent, urea liquid can be with Bi (NO3)3·5H2The hydrolysate of O is anti-
Bi should be generated2CO5, so that Bi3+More easily and H2TiO3Precipitating is generated in solution.Make precipitating reagent using urea simultaneously to be easier to lead to
Control temperature is crossed to control the pH value of solution, so that reaction rate is controlled, so that precipitating generates more evenly.
In conjunction with above-mentioned, a process for preparing Bi0.5Na0.5TiO3Powder purity is high, passes through XRD spectrum and TEM photo point
Analysis, the powder granule better crystallinity degree of preparation, crystallite dimension is small, and yield is 96% or more, while preparation process is one simple
Mixing, dry, calcination process, it is simple process, mild condition, easily controllable.
Detailed description of the invention
Fig. 1 is the Bi of preferred embodiment preparation0.5Na0.5TiO3XRD spectrum.
Fig. 2 is the Bi of preferred embodiment preparation0.5Na0.5TiO3TEM photo.
Specific embodiment
Below with reference to embodiment, the invention will be further described, and following embodiment is intended to illustrate invention rather than to this
Further limiting for invention, should not be limited the scope of the invention with this.
A kind of chemical precipitation method preparation Bi0.5Na0.5TiO3Method, comprising the following steps:
1) by Bi (NO3)3·5H2O is added into dilute nitric acid solution, and stirring is obtained to after being completely dissolved containing Bi3+Presoma
Solution, the Bi (NO3)3·5H2The ratio between amount of substance of O and dust technology is (0.25~1.25): 1；
2) precursor solution of obtained Bi is continued under stirring condition, H is added2TiO3, the solution A that is uniformly mixed；
3) the mixed uniformly solution A is continued under stirring condition, aqueous solution of urea is added, obtains B solution；Urea
Solution can be with Bi (NO3)3·5H2The hydrolyzed reaction product of O generates Bi2CO5, so that Bi3+More easily and H2TiO3Precipitating is generated,
Make precipitating reagent more easily by control temperature to control the pH value of solution using urea simultaneously, to control reaction rate, makes
Obtain precipitation reaction more evenly；
4) the mixing B solution is continued under stirring condition, Na is added2CO3Aqueous solution, obtains C solution, and each substance adds
Enter amount proportionate relationship and meets Bi (NO3)3·5H2The amount of the substance of O: H2TiO3Substance amount: the amount of the substance of urea: Na2CO3
Substance amount be (0.5~2): (1~1.5): (1~10): the additional amount ratio of (0.5~30), each substance can also meet Bi
(NO3)3·5H2The amount of the substance of O: H2TiO3Substance amount: the amount of the substance of urea: Na2CO3The ratio of amount of substance be
(1.5~6): (3~4.5): (3~30): (1.5~90)；
5) after obtained C solution being stood aging, dry in blocky little particle, standing ageing time is 1~48h；
6) further by the blocky little particle after drying in 560~670 DEG C of 0.5~8h of calcining, target is obtained
Bi0.5Na0.5TiO3Powder.
Specific embodiment 1:
Wherein mM is mM
By 0.75mM Bi (NO3)3·5H2O is added to 1.0ml 1.0mol/L HNO3In, and stir to being completely dissolved；
Continue to continuously add 1.5mM H under stirring condition2TiO3, be uniformly mixed solution A；
Continue that 5.0ml 1.7mol/L aqueous solution of urea is slowly dropped in solution A, obtains B solution under stirring condition；
Continue under stirring condition, by 5.0ml 0.5mol/L Na2CO3Aqueous solution is slowly dropped in B solution, and it is molten to obtain C
Liquid；
It is dry in blocky little particle after C solution is stood aging 48h；
Further the blocky little particle after drying is calcined into the 1h time at 610 DEG C, obtains target Bi0.5Na0.5TiO3Powder
Body, 98% or more yield.
Referring to Fig. 1, by product from the point of view of the diffraction peak of XRD spectrum without Bi0.5Na0.5TiO3Impurity phase goes out other than powder
It is existing.
Referring to fig. 2, Bi can be seen that by TEM photo0.5Na0.5TiO3Powder crystallization is complete, and pattern is uniform.
Specific embodiment 2:
By 1.25mM Bi (NO3)3·5H2O is added to 1.0ml 1.0mol/L HNO3In, and stir to being completely dissolved；
Continue to continuously add 2.50mM H under stirring condition2TiO3, be uniformly mixed solution A；
Continue that 5.0ml 1.0mol/L aqueous solution of urea is slowly dropped in solution A, obtains B solution under stirring condition；
Continue under stirring condition, by 1.0ml 1.25mol/L Na2CO3Aqueous solution is slowly dropped in B solution, and it is molten to obtain C
Liquid；
It is dry in blocky little particle after C solution is stood aging for 24 hours；
Further the blocky little particle after drying is calcined into the 6h time at 610 DEG C, obtains target Bi0.5Na0.5TiO3Powder
Body, 95% or more yield.
Specific embodiment 3:
By 2.0mM Bi (NO3)3·5H2O is added to 8.0ml 1.0mol/L HNO3In, and stir to being completely dissolved；
Continue to continuously add 1.5mM H under stirring condition2TiO3, be uniformly mixed solution A；
Continue that 10ml 1.0mol/L aqueous solution of urea is slowly dropped in solution A, obtains B solution under stirring condition；
Continue under stirring condition, by 15ml 2.0mol/L Na2CO3Aqueous solution is slowly dropped in B solution, and it is molten to obtain C
Liquid；
It is dry in blocky little particle after C solution is stood aging for 24 hours；
Further the blocky little particle after drying is calcined into the 8h time at 560 DEG C, obtains target Bi0.5Na0.5TiO3Powder
Body.
Specific embodiment 4:
By 0.5mM Bi (NO3)3·5H2O is added to 2.0ml 1.0mol/L HNO3In, and stir to complete
Dissolution；
Continue to continuously add 1.5mM H under stirring condition2TiO3, be uniformly mixed solution A；
Continue that 2.0ml 5.0mol/L aqueous solution of urea is slowly dropped in solution A, obtains B solution under stirring condition；
Continue under stirring condition, by 6.0ml 5.0mol/L Na2CO3Aqueous solution is slowly dropped in B solution,
Obtain C solution；
It is dry in blocky little particle after C solution is stood aging for 24 hours；
Further the blocky little particle after drying is calcined into the 1h time at 670 DEG C, obtains target Bi0.5Na0.5TiO3Powder
Body, 95% or more yield.
Specific embodiment 5:
By 2mM Bi (NO3)3·5H2O is added to 2.0ml 1.0mol/L HNO3In, and stir to being completely dissolved；
Continue to continuously add 1mM H under stirring condition2TiO3, be uniformly mixed solution A；
Continue that 1.0ml 1.0mol/L aqueous solution of urea is slowly dropped in solution A, obtains B solution under stirring condition；
Continue under stirring condition, by 0.5ml 1mol/L Na2CO3Aqueous solution is slowly dropped in B solution, obtains C solution；
It is dry in blocky little particle after C solution is stood aging 1h；
Further the blocky little particle after drying is calcined into the 0.5h time at 670 DEG C, obtains target Bi0.5Na0.5TiO3
Powder, 90% or more yield.
Specific embodiment 6:
By 0.5mM Bi (NO3)3·5H2O is added to 2.0ml 1.0mol/L HNO3In, and stir to being completely dissolved；
Continue to continuously add 1mM H under stirring condition2TiO3, be uniformly mixed solution A；
Continue that 2ml 0.5mol/L aqueous solution of urea is slowly dropped in solution A, obtains B solution under stirring condition；
Continue under stirring condition, by 1.0ml 0.5mol/L Na2CO3Aqueous solution is slowly dropped in B solution, and it is molten to obtain C
Liquid；
It is dry in blocky little particle after C solution is stood aging for 24 hours；
Further the blocky little particle after drying is calcined into the 1h time at 610 DEG C, obtains target Bi0.5Na0.5TiO3Powder
Body, 90% or more yield.
Claims (4)
1. a kind of chemical precipitation method prepares Bi0.5Na0.5TiO3Method, it is characterised in that: the following steps are included:
Prepare the precursor solution of Bi: by Bi (NO3)3·5H2O is added into dilute nitric acid solution, and stirring is obtained to after being completely dissolved
The precursor solution of Bi；
Add H2TiO3Template: the precursor solution of obtained Bi is continued under stirring condition, and H is added2TiO3, it is uniformly mixed
Solution A；
Addition precipitating reagent: the mixed uniformly solution A is continued under stirring condition, and aqueous solution of urea is added, obtains B solution；
Add Na2CO3Solution: the mixing B solution is continued under stirring condition, and Na is added2CO3Aqueous solution obtains C solution；On
The additional amount proportionate relationship for stating each substance meets following relationship, Bi (NO3)3·5H2The amount of the substance of O: H2TiO3Substance amount:
The amount of the substance of urea: Na2CO3Substance amount=(0.5 ~ 2): (1 ~ 1.5): (1 ~ 10): (0.5 ~ 30)；
It is dry: dry in blocky little particle after obtained C solution is stood aging；
Calcining: further the blocky little particle after drying is calcined, obtains target Bi0.5Na0.5TiO3Powder, calcination temperature 560
~ 670 DEG C, calcination time is 0.5 ~ 8 h.
2. a kind of chemical precipitation method as described in claim 1 prepares Bi0.5Na0.5TiO3Method, it is characterised in that: described
It prepares in the precursor solution of Bi, the Bi (NO3)3·5H2The ratio between amount of substance of O and dust technology is (0.25 ~ 1.25): 1.
3. chemical precipitation method as described in claim 1 prepares Bi0.5Na0.5TiO3Method, it is characterised in that: the dry step
It is 1 ~ 48 h that ageing time is stood in rapid.
4. chemical precipitation method as claimed in claim 3 prepares Bi0.5Na0.5TiO3Method, it is characterised in that: in the preparation
Bi0.5Na0.5TiO3In step, the additional amount proportionate relationship of each substance meets Bi (NO3)3·5H2The amount of the substance of O: H2TiO3's
The amount of substance: the amount of the substance of urea: Na2CO3Substance amount be 0.75:1.5:8.5:2.5.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101525239A (en) * | 2009-04-22 | 2009-09-09 | 南京工业大学 | Method for synthesizing Bi0.5Na0.5TiO3 spheroidal particles by microwave hydrothermal method |
| CN103894178A (en) * | 2014-04-14 | 2014-07-02 | 阜阳师范学院 | Preparation method of Bi0.5Na0.5TiO3 and application of Bi0.5Na0.5TiO3 to photoatalysis |
| CN103956266A (en) * | 2014-04-14 | 2014-07-30 | 桂林电子科技大学 | Lead-free Bi0.5Na0.5TiO3-based high-energy-density thin-film capacitor and manufacturing method of lead-free Bi0.5Na0.5TiO3-based high-energy-density thin-film capacitor |
| CN105060883A (en) * | 2015-07-30 | 2015-11-18 | 天津大学 | Preparation method of high density BNT target for magnetron sputtering |
-
2017
- 2017-06-23 CN CN201710484828.2A patent/CN107215895B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101525239A (en) * | 2009-04-22 | 2009-09-09 | 南京工业大学 | Method for synthesizing Bi0.5Na0.5TiO3 spheroidal particles by microwave hydrothermal method |
| CN103894178A (en) * | 2014-04-14 | 2014-07-02 | 阜阳师范学院 | Preparation method of Bi0.5Na0.5TiO3 and application of Bi0.5Na0.5TiO3 to photoatalysis |
| CN103956266A (en) * | 2014-04-14 | 2014-07-30 | 桂林电子科技大学 | Lead-free Bi0.5Na0.5TiO3-based high-energy-density thin-film capacitor and manufacturing method of lead-free Bi0.5Na0.5TiO3-based high-energy-density thin-film capacitor |
| CN105060883A (en) * | 2015-07-30 | 2015-11-18 | 天津大学 | Preparation method of high density BNT target for magnetron sputtering |
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